2022. Salivary Tumor Necrosis Factor-Alpha Levels In Nonsmokers And Smokers With Chronic Periodontitis Before And After Phase-I Periodontal Therapy: A Comparative Study. Journal of Pharmaceutical Negative Results. (Dec. 2022), 2371–2380. DOI:https://doi.org/10.47750/pnr.2022.13.S04.293.